增加函数实现

cheliequan

2023-01-13 379ec7cb8b5b36aade5ce2714b4a990bf34f8eb6

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new_obj.to_string()=[1.20,3.40,123456.78,5.00,23000000000.00]
new_obj.to_string()=[1.2,3.4,123456.78,5.0,2.3e10]